RECON: TNO occultation with 508770

Event between (508770) 95WY2 and star GA1120:02849532 with event index number of 2103098

Geocentric closest approach at 2024/12/25 03:41:07 UTC

J2000 position of star is 07:37:14.7 +22:29:35
Equinox of date position of star is 07:38:42.2 +22:26:12
Stellar brightness G=13.9, use SENSEUP=64 with the MallinCam and and exposure time of 1 seconds with the QHY174 camera.
Star is 96 degrees from the moon. Moon is 30% illuminated.
Apparent brightness V=23.6

[RECON map]
Object is 44.4 AU from the Sun and 43.4 AU from the Earth.
Apparent velocity is 24.1 km/sec on the sky relative to the star, or, 2.8 arcsec/hr.
The 1-sigma error in the time of the event is 1212 seconds.
The 1-sigma cross-track error in the shadow position is 5334 km.
The sky-plane scale is 31508.0 km/arcsec.

The object has an absolute magnitude Hv=7.1
Diameter=229.1 km assuming a 5% albedo -- 9.6 sec chord
Diameter=93.5 km assuming a 30% albedo -- 3.9 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 508770, (2024/12/25 03:41UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:50.6 +27:57:50  1.1  5.82  95
PPM 097834     07:42:28.1 +22:57:31  5.9  1.01  95
PPM 097761     07:39:09.4 +22:16:55  7.8  0.18  95
PPM 097749     07:38:31.8 +22:31:32 11.0  0.10  96
508770         07:38:44.1 +22:26:07 13.9        95
Positions are for equinox of date

This table contains the target star visibility for the RECON network. The observing range has been set to a maximum of 0.7 sigma about the mid-time.
The median site spacing is 19.4 km RECON observability=0.5 and success probability=7.4%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 03:44:24 -34.0 Dark Down 20.7 79.3 Low 03:29:24 - 03:59:24 6582
Kelowna 03:44:26 -34.6 Dark Down 21.1 79.7 Low 03:29:26 - 03:59:26 6492
Peachland 03:44:27 -34.5 Dark Down 20.9 79.4 Low 03:29:27 - 03:59:27 6490
Victoria 03:44:32 -32.1 Dark Down 18.3 76.4 Really Low 03:29:32 - 03:59:32 6483
Summerland 03:44:28 -34.5 Dark Down 20.9 79.5 Low 03:29:28 - 03:59:28 6475
Penticton 03:44:27 -34.6 Dark Down 21.0 79.5 Low 03:29:27 - 03:59:27 6466
Oliver 03:44:28 -34.6 Dark Down 20.9 79.4 Low 03:29:28 - 03:59:28 6437
Anarchist Mountain Observatory 03:44:29 -34.8 Dark Down 21.0 79.5 Low 03:29:29 - 03:59:29 6417
Sleaford 03:44:09 -42.6 Dark Down 29.7 90.9 Low 03:29:09 - 03:59:09 6374
Okanogan 03:44:31 -34.7 Dark Down 20.7 79.1 Low 03:29:31 - 03:59:31 6368
Brewster 03:44:32 -34.6 Dark Down 20.6 78.8 Low 03:29:32 - 03:59:32 6350
Manson/Chelan 03:44:33 -34.3 Dark Down 20.3 78.5 Low 03:29:33 - 03:59:33 6342
Wenatchee 03:44:33 -34.2 Dark Down 20.1 78.2 Low 03:29:33 - 03:59:33 6306
Ellensburg 03:44:35 -34.1 Dark Down 19.8 77.9 Really Low 03:29:35 - 03:59:35 6276
Yakima 03:44:36 -34.1 Dark Down 19.8 77.8 Really Low 03:29:36 - 03:59:36 6241
Toppenish/White Swan 03:44:37 -34.2 Dark Down 19.8 77.8 Really Low 03:29:37 - 03:59:37 6218
The Dalles 03:44:38 -33.7 Dark Down 19.1 77.0 Really Low 03:29:38 - 03:59:38 6172
PNWRO 03:44:37 -35.3 Dark Down 20.8 78.7 Low 03:29:37 - 03:59:37 6145
Maupin 03:44:40 -33.7 Dark Down 19.1 76.9 Really Low 03:29:40 - 03:59:40 6133
Sisters 03:44:43 -33.4 Dark Down 18.6 76.3 Really Low 03:29:43 - 03:59:43 6069
Bend 03:44:43 -33.6 Dark Down 18.7 76.4 Really Low 03:29:43 - 03:59:43 6041
Oregon Observatory 03:44:44 -33.5 Dark Down 18.6 76.3 Really Low 03:29:44 - 03:59:44 6029
Chiloquin 03:44:48 -33.1 Dark Down 18.0 75.6 Really Low 03:29:48 - 03:59:48 5924
Klamath Falls 03:44:49 -33.2 Dark Down 17.9 75.6 Really Low 03:29:49 - 03:59:49 5890
Cedarville 03:44:49 -34.4 Dark Down 18.9 76.3 Really Low 03:29:49 - 03:59:49 5779
Fall River/Burney 03:44:51 -33.4 Dark Down 17.9 75.4 Really Low 03:29:51 - 03:59:51 5772
Greenville 03:44:53 -33.7 Dark Down 18.0 75.4 Really Low 03:29:53 - 03:59:53 5675
Gimple 03:44:53 -33.8 Dark Down 18.1 75.5 Really Low 03:29:53 - 03:59:53 5672
Quincy 03:44:52 -33.7 Dark Down 18.0 75.4 Really Low 03:29:52 - 03:59:52 5656
Portola 03:44:54 -34.1 Dark Down 18.3 75.6 Really Low 03:29:54 - 03:59:54 5630
Reno 03:44:53 -34.6 Dark Down 18.7 75.9 Really Low 03:29:53 - 03:59:53 5585
Carson City 03:44:54 -34.6 Dark Down 18.7 75.8 Really Low 03:29:54 - 03:59:54 5551
Gardnerville 03:44:54 -34.6 Dark Down 18.6 75.7 Really Low 03:29:54 - 03:59:54 5527
Yerington 03:44:56 -35.0 Dark Down 19.1 76.1 Really Low 03:29:56 - 03:59:56 5513
Hawthorne 03:44:55 -35.4 Dark Down 19.4 76.2 Really Low 03:29:55 - 03:59:55 5453
Lee Vining 03:44:57 -35.0 Dark Down 18.9 75.8 Really Low 03:29:57 - 03:59:57 5415
Bishop 03:44:57 -35.5 Dark Down 19.3 76.0 Really Low 03:29:57 - 03:59:57 5335
Dunrhomin 03:44:37 -45.7 Dark Down 29.9 84.7 Low 03:29:37 - 03:59:37 5248
Beatty 03:44:57 -36.8 Dark Down 20.4 76.7 Low 03:29:57 - 03:59:57 5240
Nikitin 03:44:38 -45.7 Dark Down 29.8 84.6 Low 03:29:38 - 03:59:38 5230
CU-SBO 03:44:38 -45.7 Dark Down 29.8 84.5 Low 03:29:38 - 03:59:38 5226
Wildwood 03:45:05 -35.1 Dark Down 18.3 74.8 Really Low 03:30:05 - 04:00:05 5026
Patrick 03:44:57 -39.1 Dark Down 22.4 77.6 Low 03:29:57 - 03:59:57 5008
Laughlin/Bullhead City 03:44:58 -38.5 Dark Down 21.8 77.1 Low 03:29:58 - 03:59:58 5005
Lake Havasu City 03:45:00 -38.7 Dark Down 21.8 77.0 Low 03:30:00 - 04:00:00 4930
Idyllwild 03:45:03 -36.6 Dark Down 19.7 75.6 Really Low 03:30:03 - 04:00:03 4930
Calipatria 03:45:03 -37.6 Dark Down 20.6 75.9 Low 03:30:03 - 04:00:03 4832
George/Scottsdale 03:44:58 -40.6 Dark Down 23.7 77.9 Low 03:29:58 - 03:59:58 4779
Yuma 03:45:04 -38.3 Dark Down 21.2 76.2 Low 03:30:04 - 04:00:04 4761

Azimuth is measured in degrees eastward from north. North is at an azimuth of 0, due East is at an azimuth of 90 degrees, due South is 180, and due West is 270.

Do not use the listing below for the RECON CPC 1100 telescopes. This is provided for other non-team facilities.

Star training set for 508770, (2024/12/25 03:41UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:17.9 +28:01:33  1.1  5.82  95
PPM 097834     07:40:58.5 +23:01:07  5.9  1.01  95
PPM 097761     07:37:40.1 +22:20:23  7.8  0.18  95
PPM 097749     07:37:02.4 +22:34:59 11.0  0.10  96
508770         07:37:14.7 +22:29:35 13.9        95
Positions are for J2000

Event circumstances last updated at 2024/06/12 03:41:26 UT

Marc W. Buie, Southwest Research Institute

RECON